20523154343 has 2 divisors, whose sum is σ = 20523154344. Its totient is φ = 20523154342.

The previous prime is 20523154321. The next prime is 20523154349. The reversal of 20523154343 is 34345132502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20523154343 - 2¹⁴ = 20523137959 is a prime.

It is a super-4 number, since 4×20523154343⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20523154349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10261577171 + 10261577172.

It is an arithmetic number, because the mean of its divisors is an integer number (10261577172).

Almost surely, 2^20523154343 is an apocalyptic number.

20523154343 is a deficient number, since it is larger than the sum of its proper divisors (1).

20523154343 is an equidigital number, since it uses as much as digits as its factorization.

20523154343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 32.

Adding to 20523154343 its reverse (34345132502), we get a palindrome (54868286845).

The spelling of 20523154343 in words is "twenty billion, five hundred twenty-three million, one hundred fifty-four thousand, three hundred forty-three".